每个灯能被精确控制为研究者和高精度相机提供稳定、聚焦的光线。
Each lamp can be precisely controlled to provide even, focused light for the researchers and high-definition cameras.
先前它只是隐匿起来了，被更加粗糙的困难所淹没，并且在这些粗糙的问题被解决之后，人们才将他们的目光聚焦在这个新问题上。
It was just hidden previously and swamped by a more crude difficulty and, when the cruder difficulty is explained away, people focus their attention on the new difficulty.
与发生于晶状体中心白内障相关联的近视被归于假性近视一类，但它确实且永久地改变了光线在眼内聚焦的方式。
Nearsightedness associated with cataracts in the center of the lens is often classified with the pseudomyopias, but it is actually a permanent change in the way light focuses in the eye.
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